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/*
Copyright (C) 2019-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DCPOMATIC_VIDEO_VIEW_H
#define DCPOMATIC_VIDEO_VIEW_H
#include "optimisation.h"
#include "lib/cross.h"
#include "lib/dcpomatic_time.h"
#include "lib/exception_store.h"
#include "lib/signaller.h"
#include "lib/timer.h"
#include "lib/types.h"
#include <dcp/warnings.h>
#include <dcp/types.h>
LIBDCP_DISABLE_WARNINGS
#include <wx/wx.h>
#include <boost/signals2.hpp>
LIBDCP_ENABLE_WARNINGS
#include <boost/thread.hpp>
class FilmViewer;
class Image;
class Player;
class PlayerVideo;
class wxWindow;
class VideoView : public ExceptionStore, public Signaller
{
public:
VideoView(FilmViewer* viewer, bool wake);
virtual ~VideoView() {}
VideoView(VideoView const&) = delete;
VideoView& operator=(VideoView const&) = delete;
/** @return the thing displaying the image */
virtual wxWindow* get() const = 0;
/** Re-make and display the image from the current _player_video */
virtual void update() = 0;
/** Re-draw after changes to the FilmViewer's crop_guess() */
virtual void update_crop_guess() = 0;
/** Called when playback starts */
virtual void start();
/** Called when playback stops */
virtual void stop() {}
enum NextFrameResult {
FAIL,
AGAIN,
SUCCESS
};
/** Get the next frame and display it; used after seek */
virtual NextFrameResult display_next_frame(bool) = 0;
void clear();
bool reset_metadata(std::shared_ptr<const Film> film, dcp::Size player_video_container_size);
/** Emitted from the GUI thread when our display changes in size */
boost::signals2::signal<void()> Sized;
/** Emitted from the GUI thread when a lot of frames are being dropped */
boost::signals2::signal<void()> TooManyDropped;
/* Accessors for FilmViewer */
int dropped() const {
boost::mutex::scoped_lock lm(_mutex);
return _dropped;
}
int errored() const {
boost::mutex::scoped_lock lm(_mutex);
return _errored;
}
int gets() const {
boost::mutex::scoped_lock lm(_mutex);
return _gets;
}
StateTimer const & state_timer() const {
return _state_timer;
}
dcpomatic::DCPTime position() const {
boost::mutex::scoped_lock lm(_mutex);
return _player_video.second;
}
/* Setters for FilmViewer so it can tell us our state and
* we can then use (thread) safely.
*/
void set_video_frame_rate(int r) {
boost::mutex::scoped_lock lm(_mutex);
_video_frame_rate = r;
}
void set_length(dcpomatic::DCPTime len) {
boost::mutex::scoped_lock lm(_mutex);
_length = len;
}
void set_eyes(Eyes eyes) {
boost::mutex::scoped_lock lm(_mutex);
_eyes = eyes;
}
void set_three_d(bool t) {
boost::mutex::scoped_lock lm(_mutex);
_three_d = t;
}
void set_optimisation(Optimisation o) {
_optimisation = o;
}
protected:
NextFrameResult get_next_frame(bool non_blocking);
boost::optional<int> time_until_next_frame() const;
dcpomatic::DCPTime one_video_frame() const;
wxColour pad_colour() const;
wxColour outline_content_colour() const {
return wxColour(255, 0, 0);
}
wxColour outline_subtitles_colour() const {
return wxColour(0, 255, 0);
}
wxColour crop_guess_colour() const {
return wxColour(0, 0, 255);
}
int video_frame_rate() const {
boost::mutex::scoped_lock lm(_mutex);
return _video_frame_rate;
}
dcpomatic::DCPTime length() const {
boost::mutex::scoped_lock lm(_mutex);
return _length;
}
std::pair<std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime> player_video() const {
boost::mutex::scoped_lock lm(_mutex);
return _player_video;
}
void add_dropped();
void add_get() {
boost::mutex::scoped_lock lm(_mutex);
++_gets;
}
FilmViewer* _viewer;
StateTimer _state_timer;
Optimisation _optimisation = Optimisation::NONE;
private:
/** Mutex protecting all the state in this class */
mutable boost::mutex _mutex;
std::pair<std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime> _player_video;
int _video_frame_rate = 0;
/** length of the film we are playing, or 0 if there is none */
dcpomatic::DCPTime _length;
Eyes _eyes = Eyes::LEFT;
bool _three_d = false;
int _dropped = 0;
struct timeval _dropped_check_period_start;
int _errored = 0;
int _gets = 0;
bool _wake;
Waker _waker;
};
#endif
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